Originally Posted by
YonathanZ
Can you explain the need to change spokes? And will a Big Apple / Big Ben fit on those rims?
Based on what I've read, the BA/BB provide more comfort than the Marathon Plus, and I don't mind changing spokes if needed. I have no idea what spokes to get, though.
That should be Marathon Supreme and not Plus.
Normally, the rear spokes are 1-2 mm shorter on one side but if you need to move the rim more over to one side to fit the larger width tire in the forks then that 1-2 mm won't be enough and you'll run out of threads before you get the spokes tight enough.
Sapim spokes are very good. You can use 12 gauge on the rear and 14 gauge on the front. Only the 12 gauge are thicker and if you have eyelets on the rim spoke holes they may need to be drilled out. Spoke washers are also a good idea.
You'll need to calculate your ETRTO; this
page will help. The ETRTO for the 20" inch Big Ben is 55-406.